Pneumatic height adjustable desk



FIG. 1 is a top perspective view of a pneumatic height adjustable desk, showing my new design;

FIG. 2 is a bottom perspective thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear side view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof. 

CLAIM The ornamental design for a pneumatic height adjustable desk, as shown and described. 